A tuning guide I created from notes from watching HokiHoshi’s amazing youtube videos.
 
 

Big thanks to HokiHoshi where I learned this information from

Here are his videos of the subject where he goes more in dept but I just created this form as these are the notes/key points from his videos
 
 

 
 

 
 
 

Building Tips

 
 
 

Conversions

• Keep stock engine, only upgrade engine if pushing to another class

• More viable to keep original drivetrain

• If you can make power goal without turbo, do it
   
   
   
• Turbo’s give higher max power but only in higher rpm
   
   
   
• Supercharger give less max power but through entire rev range

 
 
 

Aero

• Try to build without front aero if you can but, if you get understeer use it

• Whenever it drops points put it on as you can tune away the downforce

 
 
 

Tires & Rims

• Makes the car feel more stable on the side that is spaced
   
   
   
• Ok to have just the rear spaced as it’ll feel more stable
   
   
   
• Used to adjust the oversteer/understeer balance

 
 
 

Drivetrain

• Doesn’t matter much on manual w/ clutch

• Sports transmission is usually best option as you rarely need to adjust individual gears

• Used to adjust final PI points

• 0 PI
   
   
   
• Sport is worthless
   
   
   
• Use race for race
   
   
   
• Use rally for rally and any offroad that’ll involve some onroad
   
   
   
• Go for off road for fully dedicated off road (Dune jumpers & Rock climbers)

 
 
 

Suspension

• Nice to have it, it is worth it about 90% of the time

• Worth it to get race as it improves handling and unlocks tuning options

• Extremely useful for fine point tuning

• ie. if you take a B-class to A-class add 1 chassis reinforcement

• Forza rewards min/max so go all in or not at all
   
   
   
• Power builds are usually favored on online racing
   
   
   
• “Adding power makes you faster on the straights, removing weight makes you faster everywhere”

 
 
 

Engine

• Spend engine upgrades last
• Intake & exhaust first
• Oil & cooling
• Turbo & displacement upgrades for last
• Cams usually cost too much PI points
• Flywheel is a great PI adjuster

 
 
 

Final Upgrade Tips

• If you have made it to the end without max PI, go back and adjust little things like, Rims, tire width, Driveline, Flywheel
• Focus your builds on first unlocking tuning options then getting right tires, transmission, suspension setup
• If you have a lot of spare PI then go with brakes, clutch, adjustable aero
• Spend final PI on reducing weight or focus on adding power

 
 
 

Tuning Tips

 
 
 

General

• Means you do not have the required options unlocked in the upgrade menu
   
   
   
• Look for the upgrades with the yellow unlock box
   
   
   
• Not all cars will have the ability to make every tuning adjustment

 
 
 

Differential

• Higher % Preferred
   
   
   
• Go for between 50-90%
   
   
   
• Higher power cars prefer higher of that range
   
   
   
• Higher setting = more oversteer

• Never set higher than acceleration setting
   
   
   
• Usually go for 0%
   
   
   
• Lower is more responsive but less stable
   
   
   
• Higher is more stable with entering corners

• Makes car feel more FWD or RWD
   
   
   
• Set between 50-80%
   
   
   
• Rally/Offroad is closer to 50%
   
   
   
• Track is closer to 80%
   
   
   
• 70% is great starting value for many cars

 
 
 

Brake

• Sliding to “front” gives more braking to the rear tires

• Higher Values mean quicker locking/ABS engagement

• These settings have little effect so not a big deal to adjust

 
 
 

Aero

• Very unimportant on cars below B-class

• Eliminates understeer, makes car feel more responsive

• More cornering grip
   
   
   
• Can make car less responsive by adding understeer

• Usually end up increasing downforce all around
• The faster you go, the bigger affect downforce will have, if you want more grip give more downforce

 
 
 

Damping

• Stock is usually pretty good

• Usually comes too stiff
   
   
   
• Should be between 50-75% of rebound stiffness
   
   
   
• Race suspension defaults to 63%
   
   
   
• You typically want bump towards the low end only rasing this if you notice the car bouncing/unstable

• If your rear end keeps sliding, increase front rebound and bump or reduce rear rebound and bump

 
 
 

Springs

• Set as low as possible without bottoming out

 
 
 

ARB (Anti-roll bars)

• Low rear will have understeer

 
 
 

Allignment

• When you are track racing camber is good
   
   
   
• Race suspension usually gives too much so bump it down a couple in front & rear
   
   
   
• Adjust via looking at the telemetry menu (more later on)

• 0.1-0.2 rear toe in to keep rear stable in corner

• Higher caster adds camber while in a turn while not affecting camber on a straight
   
   
   
• Keep between 4-7*

 
 
 

Gearing

• If you added power you’ll want to extend and go towards speed so the last line goes just past the end of the graph

• High power RWD you may want to extend 1st & 2nd to make wheelspin less likely

 
 
 

Tires

• Higher pressure feels more responsive and will loose grip quicker
   
   
   
• Lower pressure less response, slower loss of grip
   
   
   
• 26-35 psi for track
   
   
   
• Higher front psi is preferred (about 2-3 higher in the front)

 
 
 

Fine Tuning Details

• You need a place to test tune, the race track is a good pace
   
   
   
• Open Telemetry with T on pc
   
   
   
• On XBOX go to your setting and switch ANNA for telemetry then down on D-pad

 
 
 

Telemetry Tuning

• Stiffen the suspension

• If more than 20*F then lower the camber
   
   
   
• If outside is hotter than inside, add camber
   
   
   
• If outside and inside is hotter than middle add tire pressure
   
   
   
• If middle is hottest part of tire lower tire pressure

 
 
 

Troubleshooting

 
 
 

Oversteer/Understeer

• Raise front springs / ARBs
   
   
   
• Raise toe in
   
   
   
• Raise differential deceleration lock

• Raise front ARBs / spring rate
   
   
   
• Raise front rebound
   
   
   
• Adjust tire pressure / rear camber

• Adjust downforce
   
   
   
• Bump stiffness
   
   
   
• Alignment
   
   
   
• Throttle management

 
 
 

Other

• Due to damping and anti roll bars

• Lower bump stiffness

• Increase downforce
   
   
   
• Add toe

• Toe out all around

• Toe in all around

• Increase bump damping and spring stiffness

• Lessen front camber
   
   
   
• Increase caster
   
   
   
• Move brake balance towards front wheels
   
   
   
• Stiffening suspension to the front

• Adjust Aero
   
   
   
• Adjust final gear

 
 

 
 
I hope you enjoy the Guide we share about Forza Horizon 5 – Basic Car Tuning + Build Video Tutorial; if you think we forget to add or we should add more information, please let us know via commenting below! See you soon!